According to Alex Pavlovic of CSNBayArea.com, third baseman Casey McGehee left tonight’s game against the Padres with a left knee strain. He suffered the injury after getting out of the batter’s box on a fly out to end the bottom of the first inning.

Brandon Belt is currently sidelined with a mild groin strain, so the Giants were forced to go with Matt Duffy at first base and Joaquin Arias at third base. The club could call up Adam Duvall from Triple-A Sacramento if McGehee needs a stint on the disabled list.

McGehee, who was acquired from the Marlins over the winter, batted .287/.355/.357 with four home runs and 76 RBI across 160 games last season.